How to find path of the signal source from its name?

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Vick 2022-3-29

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https://ww2.mathworks.cn/matlabcentral/answers/1683264-how-to-find-path-of-the-signal-source-from-its-name

编辑： Abhaya 2024-9-6，7:40

Above is the subsystem of my big model, in this I've 2 outports and the path of the subsytem is "MyModel/handle_error/apply_linear", this outports is going to my root of the model "MyModel". If i press "highlight to source" in my required signal at root path, it is taking me to my source.

How to get this via matlab command? Like if i give a signal name "final_output", the command should be able to give path of source "MyModel/handle_error/apply_linear"

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Answer 1

Abhaya 2024-9-6，7:24

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https://ww2.mathworks.cn/matlabcentral/answers/1683264-how-to-find-path-of-the-signal-source-from-its-name#answer_1511964

编辑：Abhaya 2024-9-6，7:40

在 MATLAB Online 中打开

Hi Vick,

To trace the origin of a signal in a Simulink model, you can utilize the‘SrcBlockHandle’and‘SrcPortHandle’parameters with MATLAB ‘get_param’function.

Please follow the given steps to find the source of a signal from its handle.

Select the block from which you want to trace the signal's source.
Refer to the code given below to trace the signal to the origin.

function src=traceSignalFun(blockHandle) 
    portHandles = get_param(blockHandle, 'PortHandles');
    src=getfullname(blockHandle);
    if isfield(portHandles, 'Inport') 
        line = get_param(portHandles.Inport(1), 'Line'); 
        if line ~= -1 % Check if there is a connected line 
            
            % Get the source block of the line 
            srcBlockHandle = get_param(line, 'SrcBlockHandle'); 
            srcPortHandle = get_param(line, 'SrcPortHandle'); 
            
            % Get the full name of the source block 
            srcBlockName = getfullname(srcBlockHandle); 
            
            % Get the source port number 
            srcPortNumber = get_param(srcPortHandle, 'PortNumber'); 
            
            blockType = get_param(srcBlockHandle, 'BlockType'); 
            if strcmp(blockType, 'SubSystem') 
                % Get the blocks inside the subsystem  
                outPorts=find_system(srcBlockHandle,'SearchDepth', 1, 'BlockType', 'Outport'); 
                src=traceSignalFun(get_param(outPorts(srcPortNumber),'Handle')); 
            else
                src=getfullname(srcBlockName);
            end
        end
    end
end 
%call the function using handle to the selected block
source=traceSignalFun(gcbh);
disp(source);